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From: ori@eigenstate.org
To: 9fans@9fans.net
Subject: Re: [9fans] Plan 9 applying to GSoC
Date: Sat, 19 Feb 2022 15:01:13 -0500	[thread overview]
Message-ID: <B88F80B62C9D6B097283C5E703737821@eigenstate.org> (raw)
In-Reply-To: <F60A3813-876C-431A-BA5E-CE5A644CDD02@iitbombay.org>

Quoth Bakul Shah <bakul@iitbombay.org>:
> On Feb 19, 2022, at 3:02 AM, sirjofri <sirjofri+ml-9fans@sirjofri.de> wrote:
> > (4) A filesystem that filters a namespace, but the file contents and not the namespace.
> > 
> > The idea is to have a filesystem like exportfs, however, it doesn't just represent the files as is, but applies user-defined filters to the filenames/paths as well as the file contents.
> > 
> > Imagine you have a namespace which contains markdown files that end with .md. Using this overlay filesystem you can present the same namespace, but convert the filenames using sed (from .md to .html) and when reading, the file contents (from markdown syntax to html syntax).
> > 
> > The filesystem would be very powerful for exposing plain text data as html, encapsulating data into some predefined layout, and much more. It could essentially make any plain text filesystem available as regular web-friendly html files, convert troff source to postscript, convert plan 9 images to png, and much more. You can even present device files as json for modern web applications.
> 
> May be create a generic filter-fs that can be controlled with a script that can be updated via a control interface? Almost a mkfile like script so if a rule exists for .md -> .html, any listing will show foo.html instead of foo.md. Reading foo.html will transparently invoke a conversion program. You can get pretty clever and may be even install a src dir under /bin this way to build binaries on the fly! Or even just the presence of a mkfile in a filtered directory would be enough for this behavior. Taking this further, an installation of a new machine can be made instantaneous! Just use a local cache for all the binaries as they get built! Obviously this should be called mkfs :-)
> 

See, for example, execfs, here:

        http://felloff.net/usr/cinap_lenrek/

I use it for https://shithub.us, though it has
a number of limitations. Using it as a starting
point, but replacing regexes on the path with
a more powerful language, would probably get
quite close to what's described here.



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  reply	other threads:[~2022-02-19 20:01 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-19 19:33 Bakul Shah
2022-02-19 20:01 ` ori [this message]
  -- strict thread matches above, loose matches on Subject: below --
2022-02-18 20:03 Anthony Sorace
2022-02-19 10:21 ` Lucio De Re
2022-02-19 11:00 ` sirjofri
2022-02-20 17:45 ` ori

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